DATABASE DESIGN USING NORMALIZATION QUIZ

Each answer below shows example data from a table. Which answer is an example of the inconsistent values problem?

Three rows have the values Brown Small Chair, Small Chair Brown, and Small Brown Chair in the same column.

One row has the value "He is interested in a Silver Porsche from the years 1978-1988" in a column.

Three rows have the values Brown, NULL, and Blue in the same column.

Three columns have the values 534-2435, 534-7867, and 546-2356 in the same row.

TRUE ANSWER : ?
YOUR ANSWER : ?

We use the SQL construct COLUMNS(*) to determine the number and type of columns in a table.

True

False

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YOUR ANSWER : ?

We have normalized a table into BCNF if all candidate keys are determinants.

True

False

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YOUR ANSWER : ?

When building a database from an existing set of tables, we still need to consider normalization principles.

True

False

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YOUR ANSWER : ?

Most of the time, modification anomalies cause problems that are severe enough that a table should be normalized into BCNF.

True

False

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YOUR ANSWER : ?

One common design problem when designing a database from existing data is the presence of missing values, called blank values, in received data.

False

True

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We can eliminate modification anomalies with proper normalization that results in tables in BCNF.

True

False

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YOUR ANSWER : ?

Multivalued dependencies should ________ be eliminated.

commonly

always

seldom

never

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YOUR ANSWER : ?

When building a database from an existing set of tables, we may safely assume that referential integrity constraints have been enforced on the data we are given.

True

False

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YOUR ANSWER : ?

Normalization ________ data duplication.

maximizes

increases

reduces

eliminates

TRUE ANSWER : ?
YOUR ANSWER : ?

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